Improvement in shutter-workers



UNITED STATES PATENT OFFICE.

CHARLES M. BROWN, OF CHICAGO, ILLINOIS.

IMPROVEMENT IN SHUTTER-WORKERS.

To all whom it may concern: v

Be it known that I, CHARLES M. BROWN, of Chicago, in the county of Cookand State of Illinois, have invented certain Improvements in Attachmentsfor Window-Blinds or Shutters, of which the following is a specificationrIhe nature of this invention relates to an improved method of hangingand operating window-blinds or shutters, and to other similar purposes;the principal feature of which consists in a novel method oftransmitting power to open and shut the shutter or blind from a knob orkey inside the room by means of a series of universal joints inclosedwithin a case, which forms a part of one of the hinges; the object ofwhich is to open or shut, and fasten either open or shut, the saidwindow-blinds or shutters from the inside of the window without thetrouble of raising the window; this by means of a cam attached tooneofthe hinges, which is operated from the inside, and by which the blindis ra-ised or lowered a short distance to either catch or be releasedfrom catches in the window-sill and side of the building, as may bedesired.

Figure l is a perspective view of a windowframe and blind havingmyattachment, and showy ing the blind as closed. Fig. 2 is an interiorview of the invention, showing the mechanism by which the cam isoperated. Fig. 3 is the cap or cover to Fig. 2, and when these two aretogether they form a hinge. Fig. 4 is an enlarged vertical transversesection of A F, Fig. l, on the line y.

In Fig. 1, A represents the window-frame; F, the blind; c e, the hingesthereof 5 B I), the parts of the hinges which are fastened to the frameA; Cr, a double-ended catch hung in the blind F; f, a catch with which Gengages for fastening the blind open. In Fig. 4 the catch G is shown insection with the pin n, on which it vibrates. I?

1- represents a spring, which holds the catch G in a certain position.The ends of the catch G are sloped from the notches w w toward the ends.rlhese slopes, when .the blind is swung either clear back or shut close,strike upon the catches f and f, when the spring P gives way enough toallow the catch Gr to engage with and fasten to f or f. J is a pivot, onwhich the hinge c turns. d is a cylindrical hub or enlargement of J. Theupper surface q of cl is cut spirally around the axis of the same so asto form a cam, shown clearly at d, Fig. l, also in Fig. 2. This cam, onbeing rotated under the hinge e, (which rests on the spiral surface (1,)raises or lowers the blind, as desired. 'lhe cam d has on its uppersurface a projection or ear, o, which projects upward above the lowersurface of the neck of the hinge e, and when the cam has been turned farenough to raise or lower the blind so as to pass the catches f or j",then the projection o presses against the neck of the hinge c, and thusmoves the blind a-s desired. J is a pivot, which projects into the roomand having the end squared to receive a key or crank, by which motion isgiven to a series of universal joints, H H H H H H., which rotate thecam d. s s s s s are the internal parts of the joints H H H H H H, andare fastened to them in the usual way by means of pins o c, Sie. Ifdesired, a chain made with short thick links may be substituted for theuniversal joints H H H H H H, as a chain so constructed will opera-te insubstantially the same manner. The parts B and C are fastened togetherand to the windowframe by screws passing through the holes l Z l, madeto receive them. When the parts B and C are together a recess is formed,the cross-section of which is a circle, and the longitudinal sectionthat of a quadrant.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Iatent, is Y l. The cam d, in combination with thecase B C, universal joints H H, &'c., and shutter F, when made as andfor the purposes hereinbefore specified.

2. A case made of two parts, B and C, in combination with a series ofuniversal joints or their equivalent, and cam d, when made in the mannerand for the purposes hereinbeforelspeciiied.

CHARLES M. BROWN.

Witnesses:

GEO. G. HUNT, CEAS. F. HUNT.

